Mobile communication system, mobile station device and base station device

ABSTRACT

Provided are a communication system and a mobile station apparatus which can effectively manage setting information held in a base station apparatus and a mobile station apparatus in a system having a plurality of component carriers. The mobile communication system is formed by the base station apparatus and the mobile station apparatus. The system manages specific system information elements used by a plurality of component carriers occupying a part of the bandwidth in the system band as unique information.

TECHNICAL FIELD

The present invention relates to a communication system and a mobilestation apparatus, and more particularly, to a communication systemhaving a plurality of component carriers present therein and a mobilestation apparatus used in the communication system.

BACKGROUND ART

“3GPP (3rd Generation Partnership Project)” is a project that studiesand creates a specification of a portable telephone system that is basedon a network formed by developing W-CDMA (Wideband-Code DivisionMultiple Access) and GSM (Global System for Mobile Communications).

In 3GPP, a W-CDMA scheme is standardized as a third generation cellularmobile communication system and its services are being sequentiallystarted. HSDPA (High-Speed Downlink Packet Access) whose communicationspeed is further increased is also standardized and its services arealso being started.

In 3GPP, consideration is advancing on a mobile communication system(hereinafter, referred to as “LTE-A (Long Term Evolution-Advanced)” or“Advanced-EUTRA”) that realizes transmission and reception of data at afurther higher speed by utilizing the evolution of the third generationwireless access technology (referred to as “LTE (Long Term Evolution) orEUTRA (Evolved Universal Terrestrial Radio Access)) and a systembandwidth that is further wider.

An OFDMA (Orthogonal Frequency Division Multiple Access) system has beenproposed that executes multiplexes users using subcarriers that areorthogonal to each other, as a downlink communication system in EUTRA.

The OFDMA system employs techniques such as an adaptivemodulation/demodulation and error correction scheme (AMCS: AdaptiveModulation and Coding Scheme) that is based on adaptive radio linkcontrol (Link Adaptation) such as channel coding.

“AMCS” is a scheme that switches between wireless transmissionparameters (also referred to as “AMC mode”) such as an error-correctingsystem, the coding rate of the error correction, and the data modulationmultiple-value number due to the channel quality of each mobile stationapparatus in order to efficiently execute a high speed packet datatransmission.

The channel quality of each mobile station apparatus is fed back toabase station apparatus using CQI (Channel Quality Indicator).

FIG. 12 is a diagram of the channel configuration that is used in aconventional wireless communication system. The channel configuration isused in a wireless communication system such as EUTRA (see Non-PatentLiterature 1). The wireless communication system depicted in FIG. 12includes a base station apparatus 100 and mobile station apparatuses 200a, 200 b, and 200 c. “R01” denotes the coverage area of the base stationapparatus 100 and the base station apparatus 100 communicates with themobile station apparatuses that are present in the coverage R01.

In EUTRA, in a downlink to transmit a signal from the base stationapparatus 100 to the mobile station apparatuses 200 a to 200 c, aphysical broadcast channel (PBCH), a physical downlink control channel(PDCCH), a physical downlink shared channel (PDSCH), a physicalmulticast channel (PMCH), a physical control format indicator channel(PCFICH), and a physical hybrid ARQ indicator channel (PHICH) are used.

In EUTRA, in an uplink to transmit a signal from the mobile stationapparatuses 200 a to 200 c to the base station apparatus 100, a physicaluplink shared channel (PUSCH), a physical uplink control channel(PUCCH), and a physical random access channel (PRACH) are used.

LTE-A is based on the basic system of EUTRA. The frequency band used ina common system is continuous. In contrast, it has been proposed inLTE-A to operate a system by using a plurality of continuous ornon-continuous frequency bands (hereinafter, “carrier component” or“component carrier (CC)”) multi-functionally as one wide frequency band(a system band having a wide band) that is called, spectrum aggregationor carrier aggregation. One system band is configured by a plurality ofcomponent carriers each of which has a part of a band width of thesystem band that is an available frequency band. A mobile stationapparatus of LTE or LTE-A can operate in each of the component carriers.It has been proposed that a frequency band used in downlinkcommunication and a frequency band used in uplink communication have adifferent frequency bandwidth, respectively to more flexibly use thefrequency band that is allocated to the mobile communication system.

PRIOR ART DOCUMENT Non-Patent Literature

-   Non-Patent Literature 1: 3GPP TS (Technical Specification) 36.300,    V8.4.0 (2008-03), 3rd Generation Partnership Project; Technical    Specification Group Radio Access Network, Evolved Universal    Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial    Radio Access Network (E-UTRAN); Overall description; Stage 2    (Release 8)

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention

However, in a wireless communication system that has conventionally beenknown, a problem has existed that it is highly inefficient for a mobilestation apparatus to have wireless apparatuses that fully correspond tothe number of component carriers up to the upper layer.

The present invention was conceived in view of the above circumstancesand the object thereof is to provide a communication system and a mobilestation apparatus that can efficiently manage setting informationretained by a base station apparatus and a mobile station apparatus andthat can execute communication quickly in a system where a plurality ofcomponent carriers present.

Means for Solving the Problems

A first technical means of the present invention is a mobilecommunication system including a base station apparatus and a mobilestation apparatus, wherein specific system information elements used foreach of a plurality of component carriers having apart of a bandwidth ofa system band is managed as specific information in each of componentcarriers.

A second technical means is the mobile communication system of the firsttechnical means, wherein the specific system information elements usedfor each of the plurality of component carriers that has the section ofthe bandwidth of the system band is managed as common information ineach of the plurality of component carriers.

A third technical means is the mobile communication system of the firsttechnical means, wherein the system information elements that arespecific in each of the plurality of component carriers is separatelymanaged for each of an uplink and a downlink.

A fourth technical means is the mobile communication system of the firsttechnical means, comprising radio resource control signaling to notifyof the system information elements that are specific in each of theplurality of component carriers.

A fifth technical means is the mobile communication system of the firsttechnical means, wherein the mobile communication system is a mobilecommunication system that uses paging to notify of updating of thesystem information elements, and updating of the system informationelements that are specific to each of the plurality of componentcarriers is reported by means of a special paging method.

A sixth technical means is a mobile station apparatus in a mobilecommunication system including a base station apparatus and the mobilestation apparatus, wherein specific system information elements used foreach of a plurality of component carriers having a part of a bandwidthof a system band is managed as specific information in each of componentcarriers.

A seventh technical means is the mobile station apparatus of the sixthtechnical means, wherein the specific system information elements usedfor each of the plurality of component carriers that have the section ofthe bandwidth of the system band is managed as common information ineach of the plurality of component carriers.

An eighth technical means is the mobile station apparatus of the sixthtechnical means, wherein the system information elements that arespecific in each of the plurality of component carriers is separatelymanaged for an uplink or a downlink.

A ninth technical means is the mobile station apparatus of the sixthtechnical means, wherein the system information elements that arespecific in each of the plurality of component carriers is acquired fromradio resource control signaling.

A tenth technical means is the mobile station apparatus of the sixthtechnical means, wherein the mobile communication system is a mobilecommunication system that uses paging to notify of updating of thesystem information elements, and the mobile station apparatus detectsthat the updating is the updating of the system information elementsthat are specific in each of the plurality of component carriers whenthe updating is reported by means of a special paging method.

An eleventh technical means is the mobile station apparatus of the sixthtechnical means, wherein the mobile communication system is a mobilecommunication system that uses paging to notify of updating of thesystem information elements, and the mobile station apparatus verifies avalue tag indicating that the system information in the componentcarrier is updated for each of all the component carriers when themobile station apparatus receives the notification of the updating ofthe system information elements by means of paging.

A twelfth technical means is the mobile station apparatus of the sixthtechnical means, wherein the mobile communication system is a mobilecommunication system that uses paging to notify of updating of thesystem information elements, the mobile station apparatus updates thesystem information in a component carrier on which the paging isdisposed when receiving the notification of the updating of the systeminformation elements by means of the paging, and the mobile stationapparatus updates the system information in a component carrier on whichthe special paging is not disposed when receiving the notification ofthe updating of the system information elements using special paging.

A thirteenth technical means is the mobile station apparatus of thesixth technical means, wherein the mobile communication system is amobile communication system that uses paging to notify of updating ofthe system information elements, the mobile station apparatus updatesthe system information in a component carrier on which the paging isdisposed, when receiving the notification of the updating of the systeminformation elements using the paging and the mobile station apparatusupdates the system information in a component carrier that is designatedin the special paging when receiving the notification of the updating ofthe system information elements using special paging.

Effect of the Invention

The communication system and the mobile station apparatus of the presentinvention can efficiently manage setting information retained by a basestation apparatus and a mobile station apparatus and can executecommunication quickly in a system that has a plurality of componentcarriers present therein.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a diagram of the channel configuration of a downlink that isused in a communication system according to a first embodiment of thepresent invention.

FIG. 2 is a diagram of the channel configuration of an uplink that isused in the communication system according to the first embodiment ofthe present invention.

FIG. 3 is a diagram of the frame configuration that is used in thedownlink of the communication system according to the first embodimentof the present invention.

FIG. 4 is a diagram of the frame configuration that is used in theuplink of the communication system according to the first embodiment ofthe present invention.

FIG. 5 is a schematic block diagram of the configuration of a basestation apparatus according to the first embodiment of the presentinvention.

FIG. 6 is a schematic block diagram of the configuration of a mobilestation apparatus according to the first embodiment of the presentinvention.

FIG. 7 is a sequence chart showing processing in the wirelesscommunication system according to the first embodiment of the presentinvention.

FIG. 8 is a sequence chart for explaining a first method of theprocedure of handling the system information change notice according tothe present invention.

FIG. 9 is a sequence chart for explaining a second method of theprocedure of handling the system information change notice according tothe present invention.

FIG. 10 is a sequence chart for explaining a third method of theprocedure of handling the system information change notice according tothe present invention.

FIG. 11 is a sequence chart for explaining a fourth method of theprocedure of handling the system information change notice according tothe present invention.

FIG. 12 is a diagram of the channel configuration that is used in aconventional communication system.

BEST MODES FOR CARRYING OUT THE INVENTION

Embodiments of the present invention will be described with reference tothe accompanying drawings.

A first embodiment of the present invention will be described. Awireless communication system according to the first embodiment of thepresent invention includes one or more base station apparatuses and oneor more mobile station apparatuses, and executes wireless communicationtherebetween. One base station apparatus configures one or more cellsand one cell can hold one or more mobile station apparatuses.

FIG. 1 is a diagram of the channel configuration of a downlink that isused in the communication system according to the first embodiment ofthe present invention. FIG. 2 is a diagram of the channel configurationof an uplink that is used in the communication system according to thefirst embodiment of the present invention. A channel of the downlinkdepicted in FIG. 1 and a channel of the uplink depicted in FIG. 2 areconfigured by a logical channel, a transport channel, and a physicalchannel, respectively.

The logical channel defines the kind of data transmission service thatis transmitted and received in a medium access control (MAC) layer. Thetransport channel defines what property data transmitted by a wirelessinterface has and how the data is transmitted. The physical channel is aphysical channel that conveys the transport channel.

The logical channel of the downlink includes a broadcast control channel(BCCH), a paging control channel (PCCH), a common control channel(CCCH), a dedicated control channel (DCCH), a dedicated traffic channel(DTCH), a multicast control channel (MCCH), and a multicast trafficchannel (MTCH). The logical channel of the uplink includes a commoncontrol channel (CCCH), a dedicated control channel (DCCH), and adedicated traffic channel (DTCH).

The transport channel of the downlink includes a broadcast channel(BCH), a paging channel (PCH), a downlink shared channel (DL-SCH), and amulticast channel (MCH). The transport channel of the uplink includes anuplink shared channel (UL-SCH) and a random access channel (RACH).

The physical channel of the downlink includes a physical broadcastchannel (PBCH), a physical downlink control channel (PDCCH), a physicaldownlink shared channel (PDSCH), a physical multicast channel (PMCH), aphysical control format indicator channel (PCFICH), and a physicalhybrid ARQ indicator channel (PHICH). The physical channel of the uplinkincludes a physical uplink shared channel (PUSCH), a physical randomaccess channel (PRACH), and a physical uplink control channel (PUCCH).

These channels are transmitted and received between the base stationapparatus(es) and the mobile station apparatus(es) as depicted in FIG. 7as described for the conventional technique.

The logical channel will be described. The broadcast control channel(BCCH) is a downlink channel that is used to broadcast system controlinformation. The paging control channel (PCCH) is a downlink channelthat is used to transmit paging information, and is used when thenetwork does not know the position of a mobile station apparatus in thecell.

The common control channel (CCCH) is a channel that is used to transmitcontrol information between the mobile station apparatus and thenetwork, and is used by a mobile station apparatus that has no radioresource control (RRC) connection with the network.

The dedicated control channel (DCCH) is a bidirectional point-to-pointchannel and is used to transmit individual control information betweenthe mobile station apparatus and the network. The dedicated controlchannel (DCCH) is used by a mobile station apparatus that has a RRCconnection.

The dedicated traffic channel (DTCH) is a bidirectional point-to-pointchannel, is a channel dedicated to one mobile station apparatus, and isused to transfer user information (unicast data).

The multicast control channel (MCCH) is a downlink channel that is usedto execute point-to-multipoint transmission of MBMS (MultimediaBroadcast Multicast Service) control information from the network to themobile station apparatus. This is used for the MBMS service thatprovides point-to-multipoint services.

A transmission method of the MBMS services includes single-cellpoint-to-multipoint (SCPTM) transmission and multimedia broadcastmulticast service single frequency network (MBSFN) transmission.

“MBSFN transmission” is a simultaneous transmission technique that isrealized by simultaneously transmitting identifiable waveforms (signals)from a plurality of cells. On the other hand, “SCPTM transmission” is amethod for transmitting the MBMS service by one base station apparatus.

The multicast control channel (MCCH) is used for one or a plurality ofmulticast traffic channels (MTCH). The multicast traffic channel (MTCH)is a downlink channel that is used to execute point-to-multipointtransmission of traffic data (MBMS transmission data) from the networkto the mobile station apparatuses.

The multicast control channel (MCCH) and the multicast traffic channel(MTCH) are used only by mobile station apparatuses that receive theMBMS.

The transport channel will be described. The broadcast channel (BCH) isbroadcasted to the whole cell in a transmission scheme that is fixed anddefined in advance. On the downlink shared channel (DL-SCH), it isnecessary that HARQ (Hybrid Automatic Repeat Request), dynamic adaptiveradio link control, discontinuous reception (DRX), and MBMS transmissionare supported and broadcast to the whole cell.

On the downlink shared channel (DL-SCH), beam forming is available, anddynamic resource allocation and sub-static resource allocation aresupported. On the paging channel (PCH), it is necessary that DRX issupported and broadcast to the whole cell.

The paging channel (PCH) is mapped on a physical resource that isdynamically used for the traffic channel and other control channels,namely, the physical downlink shared channel (PDSCH).

The multicast channel (MCH) needs to be broadcast to the whole cell. Onthe multicast channel (MCH), the quasi-static resource allocation issupported such as MBSFN (MBMS Single Frequency Network) combining of theMBMS transmission from a plurality of cells and a time frame that usesexpanded cyclic prefix (CP).

On the uplink shared channel (UL-SCH), HARQ, and the dynamic adaptiveradio link control are supported. On the uplink shared channel (UL-SCH),beam forming is available, and the dynamic resource allocation and thequasi-static resource allocation are supported. On the random accesschannel (RACH), limited control information is transmitted and a risk ofcollision is present.

The physical channels will be described. The physical broadcast channel(PBCH) maps the broadcast channel (BCH) at 40-millisecond intervals. Thetiming of 40 milliseconds is blind-detected. That is, no explicitsignaling needs to be executed to present the timing. A sub-frame thatincludes the physical broadcast channel (PBCH) can be decoded by thesub-frame alone (that is, self-decodable).

The physical downlink control channel (PDCCH) is a channel that is usedto notify the mobile station apparatus of resource allocation for thedownlink shared channel (PDSCH), hybrid automatic repeat request (HARQ)information for downlink data, and an uplink transmission permission(uplink grant) that is the resource allocation for the physical uplinkshared channel (PUSCH).

The physical downlink shared channel (PDSCH) is a channel that is usedto transmit downlink data or paging information. The physical multicastchannel (PMCH) is a channel that is used to transmit the multicastchannel (MCH), and is provided with a downlink reference signal, anuplink reference signal, and a physical downlink synchronization signal,separately.

The physical uplink shared channel (PUSCH) is a channel that is used tomainly transmit uplink data (UL-SCH). When the base station apparatus100 schedules for the mobile station apparatus 200, a channel feedbackreport (a channel quality indicator “CQI”, a pre-coding matrix indicator“PMI”, and a rank indicator “RI” for the downlink) and a HARQacknowledgment (ACK: Acknowledgment/NACK: negative acknowledgment) todownlink transmission are also transmitted using the physical uplinkshared channel (PUSCH).

The physical random access channel (PRACH) is a channel that is used totransmit a random access preamble and has a guard time. The physicaluplink control channel (PUCCH) is a channel that is used to transmit thechannel feedback report (CQI, PMI, and RI), a scheduling request (SR), aHARQ for downlink transmission, an acknowledgment/negativeacknowledgment, etc.

The physical control format indicator channel (PCFICH) is a channel thatis used to notify the mobile station apparatuses of the number of OFDMsymbols that are used for the physical downlink control channel (PDCCH),and is transmitted in each sub-frame.

The physical hybrid automatic repeat request indicator channel (PHICH)is a channel that is used to transmit the HARQ ACK/NACK to the uplinktransmission.

Channel mapping by the communication system according to the firstembodiment of the present invention will be described.

As depicted in FIG. 1, in a downlink, mapping of the transport channeland that of the physical channel are executed as follows. The broadcastchannel (BCH) is mapped onto the physical broadcast channel (PBCH).

The multicast channel (MCH) is mapped onto the physical multicastchannel (PMCH). The paging channel (PCH) and the downlink shared channel(DL-SCH) are mapped onto the physical downlink shared channel (PDCCH).

The physical downlink control channel (PDCCH), the physical hybridautomatic repeat request indicator channel (PHICH), and the physicalcontrol format indicator channel (PCFICH) are used as a physical channelalone.

On the other hand, in the uplink, mapping of the transport channel andthat of the physical channel are executed as described below. The uplinkshared channel (UL-SCH) is mapped onto the physical uplink sharedchannel (PUSCH).

The random access channel (RACH) is mapped onto the physical randomaccess channel (PRACH). The physical uplink control channel (PUCCH) isused as a physical channel alone.

In the downlink, mapping of the logical channel and that of thetransport channel are executed as described below. The paging controlchannel (PCCH) is mapped onto the paging channel (PCH).

The broadcast control channel (BCCH) is mapped onto the broadcastchannel (BCH) and the downlink shared channel (DL-SCH). The commoncontrol channel (CCCH), the dedicated control channel (DCCH), and thededicated traffic channel (DTCH) are mapped onto the downlink sharedchannel (DL-SCH).

The multicast control channel (MCCH) is mapped onto the downlink sharedchannel (DL-SCH) and the multicast channel (MCH). The multicast trafficchannel (MTCH) is mapped onto the downlink shared channel (DL-SCH) andthe multicast channel (MCH).

The mapping from the multicast control channel (MCCH) and the multicasttraffic channel (MTCH) to the multicast channel (MCH) is executed whenthe MBSFN is transmitted. On the other hand, this mapping is mapped ontothe downlink shared channel (DL-SCH) when the SCPTM is transmitted.

On the other hand, in the uplink, mapping of the logical channel andthat of the transport channel are executed as described below. Thecommon control channel (CCCH), the dedicated control channel (DCCH), andthe dedicated traffic channel (DTCH) are mapped onto the uplink sharedchannel (UL-SCH). The random access channel (RACH) is not mapped withany logical channel.

The configuration of a frame that is used in the wireless communicationsystem according to the first embodiment of the present invention willbe described.

FIG. 3 is a diagram of the frame configuration that is used in thedownlink of the communication system according to the first embodimentof the present invention. FIG. 4 is a diagram of the frame configurationthat is used in the uplink of the communication system according to thefirst embodiment of the present invention. In each of FIGS. 3 and 4, theaxis of abscissa represents the time and the axis of ordinate representsthe frequency.

A wireless frame that is identified by a system frame number (SFN) isconfigured by 10 milliseconds (10 msec). One sub-frame is configured byone millisecond (one msec). A wireless frame includes 10 sub-frames #F0to “F9.

As depicted in FIG. 3, the physical control format indicator channel(PCFICH), the physical hybrid automatic repeat request indicator channel(PHICH), the physical downlink control channel (PDCCH), the physicaldownlink synchronization signal, the physical broadcast channel (PBCH),the physical downlink shared channel (PDSCH)/the physical multicastchannel (PMCH), and the downlink reference signal are disposed in awireless frame that is used in the downlink.

As depicted in FIG. 4, the physical random access channel (PRACH), thephysical uplink control channel (PUCCH), the physical uplink sharedchannel (PUSCH), an uplink decoding reference signal, and an uplinkmeasurement reference signal are disposed in the wireless frame that isused in the uplink.

One sub-frame (for example, the sub-frame #F0) is divided into two slots#S0 and #S1. When a normal cyclic prefix (normal CP) is used, a slot inthe downlink is configured by seven OFDM symbols (see FIG. 3) and a slotin the uplink is configured by seven SC-FDMA (Single Carrier-FrequencyDivision Multiple Access) symbols (see FIG. 4).

When an expanded CP (also referred to as “long CP” or “extended CP”) isused, a slot in the downlink is configured by six OFDM symbols and aslot in the uplink is configured by six SC-FDMA symbols.

One slot is divided into a plurality of blocks in the direction of thefrequency. One physical resource block (PRB) is configured using 12sub-carriers at 15 kHz as the unit in the direction of the frequency.The number of physical resource blocks (PRBs) is supported from six to110 depending on the system bandwidth. FIGS. 3 and 4 depict the casewhere the number of physical resource blocks (PRBs) is 25. Differentsystem bandwidths can also be used in the uplink and the downlink. 6 to110 physical resource blocks (PRBs) can be supported depending on thetotal system bandwidth. A component carrier is usually configured by 100physical resource blocks. A guard band is inserted between componentcarriers and five component carriers can be configured for 500 physicalresource blocks as the whole system bandwidth. Representing the aboveusing bandwidths, for example, a component carrier is configured by 20MHz, a guard band is inserted between component carriers, and fivecomponent carriers can be configured for 100 MHz as the whole systembandwidth.

The resource allocation for the downlink and that for the uplink areexecuted by sub-frame by sub-frame in the direction of time and byphysical resource block (PRBs) by physical resource block in thedirection of the frequency. Two slots in a sub-frame are allocated usingone resource allocation signal.

The unit that is configured by a sub-carrier and an OFDM symbol, or asub-carrier and an SC-FDMA symbol is referred to as “resource element”.A modulation symbol, etc., are mapped onto each resource element in aresource mapping process in the physical layer.

In a process in the physical layer of the downlink transport channel, a24-bit cyclic redundancy check (CRC) to the physical downlink sharedchannel (PDSCH), channel coding (transmission path coding), the physicallayer HARQ process, channel interleaving, scrambling, modulation (QPSK(Quadrature Phase Shift Keying), 16QAM (Quadrature AmplitudeModulation), and 64QAM), layer mapping, pre-coding, resource mapping,and antenna mapping are executed.

On the other hand, in a process in the physical layer of the uplinktransport channel, a 24-bit cyclic redundancy check (CRC) to thephysical uplink shared channel (PDSCH), channel coding (transmissionpath coding), the physical layer HARQ process, scrambling, modulation(QPSK, 16QAM, and 64QAM), resource mapping, and antenna mapping areexecuted.

The physical downlink control channel (PDCCH), the physical hybridautomatic repeat request indicator channel (PHICH), and the physicalcontrol format indicator channel (PCFICH) are disposed below the first30 FDM symbols.

In the physical downlink control channel (PDCCH), a transport format(that defines the modulation scheme, the coding scheme, the transportblock size, etc.), the resource allocation, and the HARQ information foreach of the downlink shared channel (DL-SCH) and the paging channel(PCH) are transmitted.

In the physical downlink control channel (PDCCH), a transport format(that defines the modulation scheme, the coding scheme, the transportblock size, etc.), the resource allocation, and the HARQ information forthe uplink shared channel (UL-SCH) are transmitted.

A plurality of physical downlink control channels (PDCCHs) are supportedand the mobile station apparatus monitors the set of the physicaldownlink control channels (PDCCHs).

The physical downlink shared channel (PDSCH) allocated by the physicaldownlink control channel (PDCCH) is mapped onto the same sub-frame asthat of the physical downlink control channel (PDCCH).

The physical uplink shared channel (PUSCH) allocated by the physicaldownlink control channel (PDCCH) is mapped onto a sub-frame at apredetermined position. For example, when the downlink sub-frame numberof the physical downlink control channel (PDCCH) is “N”, the physicaluplink shared channel (PUSCH) is mapped onto an uplink sub-frame whosenumber is “N+4”.

The mobile station apparatus is identified using 16-bit MAC layeridentification information (MAC ID) in the resource allocation in theuplink/downlink by the physical downlink control channel (PDCCH). This16-bit MAC layer identification information (MAC ID) is included in thephysical downlink control channel (PDCCH).

The downlink reference signal (downlink pilot channel) that is used formeasurement of the state of the downlink and demodulation of thedownlink data is disposed in each of the first and the second OFDMsymbols from the head and the third OFDM symbol from the last of eachslot.

On the other hand, an uplink demodulation reference signal (demodulationpilot (DRS: Demodulation Reference Signal)) that is used fordemodulation of the physical uplink shared channel (PUSCH) istransmitted using the fourth SC-FDMA symbol of each slot.

The uplink measurement reference signal (scheduling pilot (SRS: SoundingReference Signal)) that is used for the measurement of the state of theuplink is transmitted using the last SC-FDMA symbol of a sub-frame.

The demodulation reference signal of the physical uplink control channel(PUCCH) is defined for each format of the physical uplink controlchannel and is transmitted using the third, the fourth, and the fifthSC-FDMA symbols of each slot or the second and the sixth SC-FDMA symbolsof each slot.

The physical broadcast channel (PBCH) and the downlink synchronizationsignal are disposed in a band that corresponds to six physical resourceblocks in the center of the system band. The physical downlinksynchronization signal is transmitted using the sixth and the seventhOFDM symbols of each slot of the first (sub-frame #F0) and the fifth(sub-frame #F4) sub-frames.

The physical broadcast channel (PBCH) is transmitted using the fourthand the fifth OFDM symbols of the first slot (slot #S0) and the firstand the second OFDM symbols of the second slot (slot #S1) of the firstsub-frame (sub-frame #F0).

The physical random access channel (PRACH) is configured by a bandwidththat corresponds to six physical resource blocks in the direction of thefrequency, and one sub-frame in the direction of time. The physicalrandom access channel (PRACH) is transmitted from the mobile stationapparatus to the base station apparatus to give requests (such as arequest for uplink resources, a request for an uplink synchronization, adownlink data transmission restart request, a handing-over request, aconnection setting request, a reconnection request, and an MBMS servicerequest) for various reasons.

The physical uplink control channel (PUCCH) is disposed at both ends ofthe system band and is configured on a physical resource block basis.Frequency hopping is executed such that the ends of the system band arealternately used among slots.

FIG. 5 is a schematic block diagram of the configuration of the basestation apparatus 100 according to the first embodiment of the presentinvention. The base station apparatus 100 includes a data controlsection 101, an OFDM modulating section 102, a wireless section 103, ascheduling section 104, a channel estimating section 105, a DFT-S-OFDM(DFT-Spread-OFDM) demodulating section 106, a data extracting section107, an upper layer 108, and an antenna section A1.

The wireless section 103, the scheduling section 104, the channelestimating section 105, the DFT-S-OFDM demodulating section 106, thedata extracting section 107, the upper layer 108, and the antennasection A1 configure a receiving section. The data control section 101,the OFDM modulating section 102, the wireless section 103, thescheduling section 104, the upper layer 108, and the antenna section A1configure a transmitting section. A section of each of the transmittingand the receiving sections is configured to separately executeprocessing for each component carrier, and another section thereof isconfigured to execute processing that is common to the componentcarriers.

The antenna section A1, the wireless section 103, the channel estimatingsection 105, the DFT-S-OFDM demodulating section 106, and the dataextracting section 107 execute processing for the physical layer of theuplink. The antenna section A1, the data control section 101, the OFDMmodulating section 102, and the wireless section 103 execute processingfor the physical layer of the downlink.

The data control section 101 acquires the transport channel from thescheduling section 104. The data control section 101 maps the transportchannel and the signals and the channels created in the physical layerbased on the scheduling information input from the scheduling section104, onto the physical channel based on the scheduling information inputfrom the scheduling section 104. Pieces of data mapped as above areoutput to the OFDM modulating section 102.

The OFDM modulating section 102 executes OFDM signal processing such ascoding, data modulation, serial/parallel transformation of an inputsignal, an IFFT (Inverse Fast Fourier Transformation) process, insertionof a cyclic pre-fix (CP), and filtering, for data that is input from thedata control section 101 based on the scheduling information input fromthe scheduling section 104 (including downlink physical resource block(PRB) allocation information (for example, physical resource blockposition information such as the frequency and time), and the modulationschemes and the coding schemes that support the downlink physicalresource blocks (PRBs) (including such as 16QAM modulation and a 2/3coding rate), and the OFDM modulating section 102 creates an OFDM signaland outputs the OFDM signal to the wireless section 103.

The wireless section 103 creates a wireless signal by up-converting themodulated data that is input from the OFDM modulating section 102 intothat of a wireless frequency, and transmits the up-converted data to themobile station apparatus 200 through the antenna section A1. Thewireless section 103 receives a wireless signal in the uplink from themobile station apparatus 200 through the antenna section A1, and outputsthe received signal to the channel estimating section 105 and theDFT-S-OFDM demodulating section 106 by down-converting the receivedsignal into a baseband signal.

The scheduling section 104 executes processing for a medium accesscontrol (MAC) layer. The scheduling section 104 executes mapping of thelogical channel and the transport channel, and scheduling for thedownlink and the uplink (the HARQ process, selection of a transportformat, etc.) and the like. The scheduling section 104 integrates theprocessing sections of the physical layers to control the sections and,therefore, an interface is present between the scheduling section 104,and the antenna section. A1, the wireless section 103, the channelestimating section 105, the DFT-S-OFDM demodulating section 106, thedata control section 101, the OFDM modulating section 102, and the dataextracting section 107. However, the interface is not depicted.

In the scheduling for the downlink, the scheduling section 104 executesprocessing for selecting the transport format (transmission form) of thedownlink to modulate each piece of data (such as allocation, themodulation scheme, and the coding scheme of the physical resource blocks(PRBs)), retransmission control in HARQ, and generation of thescheduling information to be used in the scheduling for the downlink,based on feedback information received from the mobile station apparatus200 (including the channel feedback report of the downlink (such as thechannel quality (CQI), the number of streams (RI), and pre-codinginformation (PMI)), information on the downlink physical resource blocks(PRBs) that are available for the mobile station apparatuses such asACK/NACk feedback information for the downlink data), the state of abuffer, the scheduling information input from the upper layer 108, etc.The scheduling information used in the scheduling for the downlink isoutput to the data control section 101 and the data extracting section107.

In the scheduling for the uplink, the scheduling section 104 executesprocessing for selecting the transport format (transmission form) of theuplink to modulate each piece of data (such as allocation, themodulation scheme, and the coding scheme of the physical resource blocks(PRBs)) and generation of the scheduling information to be used in thescheduling for the uplink, based on the result of estimation of thechannel state (wireless propagation path state) of the uplink that isoutput from the channel estimating section 105, the resource allocationrequest from the mobile station apparatus 200, information on downlinkphysical resource blocks (PRBs) that are available for each mobilestation apparatus 200, the scheduling information input from the upperlayer 108 and the like.

The scheduling information used in the scheduling for the uplink isoutput to the data control section 101 and the data extracting section107.

The scheduling section 104 maps the downlink logical channel that isinput from the upper layer 108 onto the transport channel, and outputsthe mapping result to the data control section 101. The schedulingsection 104 processes the control data acquired in the uplink that isinput from the data extracting section 107 and the transport channel asneeded, and then, maps the data and the channel that are processed ontothe logical channel in the uplink, and outputs the mapping result to theupper layer 108.

To demodulate the uplink data, the channel estimating section 105estimates the channel state of the uplink from the uplink demodulationreference signal (DRS) and outputs the estimation result to theDFT-S-OFDM demodulating section 106. To execute the scheduling for theuplink, the channel estimating section 105 estimates the channel stateof the uplink from the uplink measurement reference signal (SRS:Sounding Reference Signal) and outputs the estimation result to thescheduling section 104.

A single-carrier scheme such as DFT-S-OFDM is assumed as thecommunication scheme of the uplink. However, a multi-carrier scheme suchas an OFDM scheme may be used.

The DFT-S-OFDM demodulating section 106 applies a demodulationprocessing to the modulated data input from the wireless section 103 byexecuting DFT-S-OFDM signal processing such as DFT (Discrete FourierTransformer) transformation, sub-carrier mapping, IFFT transformation,and filtering, based on the estimation result of the uplink channelstate that is input from the channel estimating section 105, and outputsthe processed data to the data extracting section 107.

The data extracting section 107 checks errors in the data that is inputfrom the DFT-S-OFDM demodulating section 106 based on the schedulinginformation from the scheduling section 104 and outputs the check result(positive signal ACK/negative signal NACK) to the scheduling section104.

The data extracting section 107 separates the data input from theDFT-S-OFDM demodulating section 106 into the transport channel and thecontrol data of the physical layer based on the scheduling informationfrom the scheduling section 104, and outputs the channel and the data tothe scheduling section 104.

The separated control data includes such as feedback informationnotified from the mobile station apparatus 200 (a downlink channelfeedback report (CQI, PMI, and RI) and ACK/NACK feedback information fordata in the downlink).

The upper layer 108 executes processing for a packet data convergenceprotocol (PDCP) layer, a radio link control (RLC) layer, and a radioresource control (RRC) layer. The upper layer 108 integrates processingsections of a lower layer to control the processing sections and,therefore, an interface is present between the upper layer 108 and thescheduling section 104, the antenna section A1, the wireless section103, the channel estimating section 105, the DFT-S-OFDM demodulatingsection 106, the data control section 101, the OFDM modulating section102, and the data extracting section 107. However, the interface is notdepicted.

The upper layer 108 includes a radio resource control section 109. Theradio resource control section 109 executes management of various piecesof setting information, management of the system information, pagingcontrol, management of the communication state of the mobile stationapparatuses, management of moving such as handing over, management ofthe buffer state of each mobile station apparatus, management of theconnection setting of unicast and multicast bearers, management ofmobile station identifiers (UEIDs), etc. The upper layer 108 deliversand receives information to another base station apparatus andinformation to an upper node.

FIG. 6 is a schematic block diagram of the configuration of the mobilestation apparatus 200 according to the first embodiment of the presentinvention. The mobile station apparatus 200 includes a data controlsection 201, a DFT-S-OFDM modulating section 202, a wireless section203, a scheduling section 204, a channel estimating section 205, an OFDMdemodulating section 206, a data extracting section 207, an upper layer208, and an antenna section A2.

The data control section 201, the DFT-S-OFDM modulating section 202, thewireless section 203, the scheduling section 204, the upper layer 208,and the antenna section A2 configure a transmitting section. Thewireless section 203, the scheduling section 204, the channel estimatingsection 205, the OFDM demodulating section 206, the data extractingsection 207, the upper layer 208, and the antenna section A2 configure areceiving section. The scheduling section 204 configures a selectingsection.

The antenna section A2, the data control section 201, the DFT-S-OFDMmodulating section 202, and the wireless section 203 execute processingfor the physical layer in the uplink. The antenna section A2, thewireless section 203, the channel estimating section 205, the OFDMdemodulating section 206, and the data extracting section 207 executeprocessing for the physical layer in the downlink. A section of each ofthe transmitting and the receiving sections is configured to separatelyexecute processing for each component carrier, and another sectionthereof is configured to execute processing common to the componentcarriers.

The data control section 201 acquires the transport channel from thescheduling section 204. The data control section 201 maps the signalsand the channels that are created in the physical layer based on thetransport channel and the scheduling information that is input from thescheduling section 204, onto the physical channel based on thescheduling information input from the scheduling section 204. Pieces ofdata mapped in this manner are output to the DFT-S-OFDM modulatingsection 202.

The DFT-S-OFDM modulating section 202 executes DFT-S-OFDM signalprocessing such as data modulation, a DFT process, sub-carrier mapping,an inverse fast Fourier transformation (IFFT) process, cycling prefix(CP) insertion, and filtering, for the data input from the data controlsection 201, thereby, generates a DFT-S-OFDM signal, and outputs thesignal to the wireless section 203.

A single-carrier scheme such as DFT-S-OFDM is assumed as thecommunication scheme of the uplink. However, a multi-carrier scheme suchas an OFDM scheme may be used instead.

The wireless section 203 generates a wireless signal by up-convertingthe modulated data that is input from the DFT-S-OFDM modulating section202 to a wireless frequency, and transmits the wireless signal to thebase station apparatus 100 through the antenna section A2.

The wireless section 203 receives a wireless signal that is modulated bythe data in the downlink from the base station apparatus 100 through theantenna section A2, and outputs the received data to the channelestimating section 205 and the OFDM demodulating section 206 bydown-converting the received wireless signal to a baseband signal.

The scheduling section 204 executes processing for the medium accesscontrol layer. The scheduling section 104 executes mapping of thelogical channel and the transport channel, scheduling for the downlinkand that for the uplink (the HARQ process, selection of the transportformat, etc.), etc. The scheduling section 104 integrates the processingsections of the physical layers to control the processing sections and,therefore, an interface is present between the scheduling section 104,and the antenna section A2, the data control section 201, the DFT-S-OFDMmodulating section 202, the channel estimating section 205, the OFDMdemodulating section 206, the data extracting section 207, and thewireless section 203. However, the interface is not depicted.

In the scheduling for the downlink, the scheduling section 204 executesreception control of the transport channel, physical signals, and thephysical channels, the HARQ retransmission control, and generation ofthe scheduling information to be used in the scheduling for the downlinkbased on the scheduling information (the transport format and the HARQretransmission information) from the base station apparatus 100 and theupper layer 208. The scheduling information used in the scheduling forthe downlink is output to the data control section 201 and the dataextracting section 207.

In the scheduling for the uplink, the scheduling section 204 executes ascheduling processing for mapping the logical channel of the uplink thatis input from the upper layer 208 onto the transport channel, andgeneration of the scheduling information to be used in the scheduling ofthe uplink, based on the state of the buffer, the scheduling information(the transport format, the HARQ retransmission information, etc.) of theuplink from the base station apparatus 100 that is input from the dataextracting section 207, the scheduling information that is input fromthe upper layer 208, and the like.

The information reported from the base station apparatus 100 is used forthe transport format of the uplink. The scheduling information is outputto the data control section 201 and the data extracting section 207.

The scheduling section 204 maps the uplink logical channel that is inputfrom the upper layer 208 onto the transport channel, and outputs themapping result to the data control section 201. The scheduling section204 also outputs to the data control section 201 the downlink channelfeedback report (CQI, PMI, and RI) input from the channel estimatingsection 205 and the result of the CRC check input from the dataextracting section 207.

The scheduling section 204 executes processing for the control dataacquired in the downlink that is input from the data extracting section207 and the transport channel as needed, thereafter, maps the data andthe channel that are processed onto the logical channel in the downlink,and outputs the mapping result to the upper layer 208.

To demodulate the downlink data, the channel estimating section 205estimates the channel state of the downlink from the downlink referencesignal (RS) and outputs the estimation result to the OFDM demodulatingsection 206.

The channel estimating section 205 estimates the channel state of thedownlink from the downlink reference signal (RS), converts theestimation result into a downlink channel feedback report (includingchannel quality information), and outputs the report to the schedulingsection 204 in order to notify the base station apparatus 100 of theestimation result of the downlink channel state (wireless propagationpath state).

The OFDM demodulating section 206 applies an OFDM demodulationprocessing to the modulated data input from the wireless section 203based on the downlink channel state estimation result that is input fromthe channel estimating section 205, and outputs the resultant data tothe data extracting section 207.

The data extracting section 207 executes the cyclic redundancy check(CRC) for the data input from the OFDM demodulating section 206,thereby, checks for errors in the data, and outputs the check result(ACK/NACK feedback information) to the scheduling section 204.

The data extracting section 207 separates the data input from the OFDMdemodulating section 206 into the transport channel and the control dataof the physical layer based on the scheduling information from thescheduling section 204, and outputs the channel and the data to thescheduling section 204. The separated control data includes thescheduling information such as the resource allocation for the downlinkor the uplink and the HARQ control information of the uplink. At thistime, the resource allocation for the downlink or the uplink addressedto its own station and the like are extracted by executing decodeprocessing to a search space (also referred to as “search region”) ofthe physical downlink control signal (PDCCH).

The upper layer 208 executes processing for the packet data convergenceprotocol (PDCP) layer, the radio link control (RLC) layer, and the radioresource control (RRC) layer. The upper layer 208 includes a radioresource control section 209. The upper layer 208 integrates theprocessing sections of the lower layer to control the processingsections and, therefore, an interface is present between the upper layer208 and the scheduling section 204, the antenna section A2, the datacontrol section 201, the DFT-S-OFDM modulating section 202, the channelestimating section 205, the OFDM demodulating section 206, the dataextracting section 207, and the wireless section 203. However, theinterface is not depicted.

The radio resource control section 209 executes management of variouskinds of setting information, management of the system information, thepaging control, management of the communication state of the mobilestation itself, management of moving such as handing over, management ofthe buffer state, management of the connection settings of unicast andmulticast bearers, and management of a mobile station identifier (UEID).

Returning to the description of the first embodiment, processing of thebase station apparatus 100 and that of the mobile station apparatus 200will be described.

A “DL master region” is a downlink frequency layer (a component carrieror a component carrier group) that the mobile station apparatus firstaccesses. The mobile station apparatus acquires a signal in this regionand, thereafter, can access another region (slave region). A downlinksynchronization signal (SCH) is disposed in the region, from which atleast downlink synchronization can be acquired.

A “DL slave region” is a downlink frequency layer (a component carrieror a component carrier group) that the mobile station apparatus accessesafter acquiring the information in the master region or that the mobilestation apparatus accesses after an additional instruction by the basestation apparatus.

A “UL master region” is an uplink frequency layer (a component carrieror a component carrier group) that the mobile station apparatus firstaccesses, and is a component carrier or a component carrier group thatis designated by the DL master region or that is correlated with the DLmaster region.

A “UL slave region” is an uplink frequency layer (a component carrier ora component carrier group) that the mobile station apparatus accessesafter communication using the UL master region or that the mobilestation apparatus accesses after an additional instruction by the basestation apparatus.

Hereinafter, a master region or a slave region simply refers to a DLmaster region and/or a UL master region, or a DL slave region and/or aUL slave region.

Specific channels (such as the downlink synchronization signal (SCH),the physical downlink broadcast channel (PBCH), the broadcast controlchannel (BCCH), the paging control channel (PCCH), the common controlchannel (CCCH), and/or the physical uplink control channel (PUCCH)) maynot sometimes present in the slave region.

Master regions and slave regions for the mobile station apparatuses maydiffer from each other. A master region for a mobile station apparatusmay be adapted to be a slave region for another mobile stationapparatus. In this case, the downlink synchronization signal (SCH) mayalso be disposed in a slave region for the mobile station apparatus.

A master region and a slave region may be disposed at carrierfrequencies that are next to each other or may be disposed at carrierfrequencies that are away from each other.

System information elements (parameters) managed in RRC are broadcast inthe broadcast control channel (BCCH), or reported from the base stationapparatus to the mobile station apparatus using RRC signaling of thecommon control channel (CCCH) and/or the dedicated control channel(DCCH).

The system information elements (IE) managed in this RRC are managed byclassifying them into the parameters that are commonly used among allthe component carriers (CCC: Component Carrier Common) and theparameters that are different for each component carrier (that each arespecific to each component carrier) (CCD: Component Carrier Dedicated).A system information element that is commonly used among all thecomponent carriers is referred to as “CCC system information element(CCCIE)”. A system information element that is different for eachcomponent carrier is referred to as “CCD system information element(CCDIE)”.

For example, examples of CCCIEs can be IEs such as plmn-Identity,s-Periodicity, and cell Identity. Examples of CCDIDs can be IEs that areused in “Idle” state such as trackingAreaCode, cellBarred, q-Hyst, andt-ReselectionEUTRAN, and IEs that are used in “Connected” state such assysteminformationValueTag, and radioResourceConfigCommon. When only onecomponent carrier is adapted to be camped in the Idle state, onecomponent carrier only need to be managed even for CCCIE or CCDIE.

The scheduling and the IE management of the mobile station apparatus mayalso be simplified by preparing not only a system information block SIBthat has CCCIEs and CCDIEs mixed therein (an aggregation of a pluralityof IEs transmitted at the same transmission cycle) but also newlypreparing SIB including only CCDIEs.

When giving notice of CCDIE using the RRC signaling, a new type of RRCmessage that gives notice of IE by designating the component carriernumber may be prepared or the notice of IE may be given by expanding anRRC connection reconfiguration message (RRCConnectionReconfigurationMessage) and designating the component carrier number.

When giving notice of CCDIE using SIB, the notice of IE is given bydesignating the number of the component carrier to which the CCDIE isapplied.

FIG. 7 is a sequence chart of processes of the wireless communicationsystem according to the first embodiment of the present invention.

First, the mobile station apparatus 200 acquires the downlinksynchronization signal (SCH) of the base station apparatus 100 by a cellselection processing or a cell reselection processing, and executes adownlink synchronization processing (step S101). At this step, thedownlink synchronization signal (SCH) is disposed in a master regionZ01.

The mobile station apparatus 200 acquires the broadcast control channel(BCCH) that is transmitted on the physical broadcast channel (PBCH) orthe physical downlink shared channel (PDSCH) as operated in the masterregion Z01 (step S102). At this step, the mobile station apparatus 200acquires information on the master region Z01 (such as the systembandwidth (the number of resource blocks) of the master region Z01) fromthe broadcast control channel (BCCH) (step S103), and executes acontinued processing as operated in the master region Z01.

The mobile station apparatus 200 executes an RRC connection establishingprocessing in the master region Z01 and, thereby, establishes thecommunication state (RRC connection state). The information regardingaddition of a component carrier (such as information indicating itemssuch as the system bandwidth of the master region (the number ofresource blocks) and/or the carrier frequency and the system bandwidth(the number of resource blocks) of a slave region Z02, and/or versioninformation of the mobile station apparatus 200) are reported from thebase station apparatus 100 to the mobile station apparatus 200 using anRRC connection setup (the common control channel (CCCH) (RRC signaling))during the RRC connection establishing process and the dedicated controlchannel (DCCH) (RRC signaling) to the mobile station apparatus 200 thatis in communication with (step S104).

The common control channel (CCCH) and the dedicated control channel(DCCH) are mapped onto the downlink shared channel (DL-SCH) in themaster region Z01. This downlink shared channel (DL-SCH) is transmittedusing dynamic resources of the physical downlink shared channel that isdesignated by the physical downlink control channel (PDCCH).

The mobile station apparatus 200 that has acquired the information onthe addition of the component carrier adjusts the wireless section 203such that the wireless section 203 can receive up to the slave sectionZ02.

After acquiring the information on the addition of the componentcarrier, the mobile station apparatus 200 acquires the systeminformation elements that are defined in CCD from the broadcast controlchannel (BCCH) that is broadcast in the slave region. Alternatively, thebase station apparatus 100 notifies the mobile station apparatus 200 ofthe information on the addition of the component carrier and the CCDsystem information elements defined in CCD using RRC signalingtransmitted by the common control channel (CCCH) and the dedicatedcontrol channel (DCCH).

When the mobile station apparatus 200 get informed the CCD systeminformation elements from the base station apparatus 100 using the RRCsignaling, the mobile station apparatus 200 manages the CCD systeminformation elements for each component carrier (step S105). The mobilestation apparatus 200 manages the CCD system information elements,CCDIE1, CCDIE2, . . . , CCDIEn, respectively for component carriers 1,2, . . . , n and manages the CCC system information element, CCCIE, thatis common to the component carriers.

The mobile station apparatus 200 may start communication using eachcomponent carrier in the order of acquiring CCDIE, or may startcommunication using the added component carriers after acquiring all theCCDIEs for the added component carriers.

When the base station apparatus 100 has a plurality of master regionsZ01 in a band to accommodate them, the base station apparatus 100 needsto detect the master region Z01 of the mobile station apparatus 200. Themaster region Z01 of the mobile station apparatus 200 is detected usingthe physical random access channel (PRAXH) or the random access channel(RACH), or the master region Z01 of the mobile station apparatus 200 isreported from the mobile station apparatus 200 to the base stationapparatus 100 using the common control channel (CCCH) during a procedurefor random accessing.

The master region Z01 of the mobile station apparatus 200 is designatedfrom the base station apparatus 100 using the dedicated control channel(DCCH) and is changeable.

The left side of the sequence chart of FIG. 7 depicts frequency regionsreceivable at steps for the mobile station apparatus 200 and the systeminformation elements used by the mobile station apparatus 200. Themobile station apparatus 200 can receive resources in a region necessaryfor acquiring the physical broadcast channel disposed in a part of themaster region Z01 at steps S101 to S103, resources in a region of themaster region Z01 at steps S103 to S105, and resources in the masterregion Z01 and the slave region Z02 at and after step S105.

A method for separately managing CCD and CCC from each other in each ofthe uplink and the downlink will be described. The system informationelements (IE) that are managed by RRC are managed by classifying theminto parameters that are commonly used among all the component carriersin the downlink (CCCDL: Component Carrier Common Downlink) andparameters that each are different for a component carrier in thedownlink (CCDDL: Component Carrier dedicated Downlink), parameters thatare commonly used among all the component carriers in the uplink (CCCUL:Component Carrier Common Uplink) and parameters that each are differentfor a component carrier in the uplink (CCDUL: Component Carrierdedicated Uplink).

At step 104, after acquiring the information on the addition of thecomponent carrier, the mobile station apparatus 200 determines whetherthe information on the component carrier addition indicates uplinkcomponent carrier addition, downlink component carrier addition, ordownlink and uplink component carrier addition. Designation as towhether the component carrier to be added is that of the uplink or thedownlink is issued for the RRC signaling for component addition.

The mobile station apparatus 200 acquires system information elementsdefined in CCDUL when the component carrier addition is for the uplink,system information elements defined in CCDDL when the component carrieraddition is for the downlink, and system information elements defined inCCDDL and CCDUL when the component carrier addition is for the downlinkand the uplink, from the broadcast control channel (BCCH) that isbroadcast in the slave region. Alternatively, the base station apparatus100 notifies the mobile station apparatus 200 of information on thecomponent carrier addition and CCD system information elements definedin CCDDL and/or CCDLL, using the RRC signaling transmitted in the commoncontrol channel (CCCH) and the dedicated control channel (DCCH).

When the mobile station apparatus 200 get informed the CCD systeminformation elements from the base station apparatus 100 using the RRCsignaling, the mobile station apparatus 200 manages the CCD systeminformation elements for each uplink component carrier and each downlinkcomponent carrier. The mobile station apparatus 200 manages: CCDULsystem information elements (CCDULIE 1, CCDULIE 2, . . . , CCDULIE n)respectively for UL component carrier 1, UL component carrier 2, . . . ,UL component carrier n; CCDDL system information elements (CCDDLIE 1,CCDDLIE 2, . . . , CCDDLIE m) respectively for DL component carrier 1,DL component carrier 2, . . . , DL component carrier m; and a CCC systeminformation element CCCIE that is common to the component carriers.

The mobile station apparatus 200 may start communication using theuplink component carriers starting from the uplink component carrierwhose CCDULIE has been acquired and may start communication using thedownlink component carriers starting from the downlink component carrierwhose CCDULIE has been acquired. Alternatively, the mobile stationapparatus 200 may start communication using these added uplink and/ordownlink component carriers after acquiring all the CCDDLIE and/orCCDULIE of the added uplink and/or downlink component carriers that aredesignated by the base station apparatus 100.

A first method of the procedure for handling a change notice of thesystem information will be described with reference to FIG. 8. Thechange of the system information is reported using the paging channel(PCH). When CCDIE and/or CCCIE is (are) changed, the base stationapparatus 100 notifies the mobile station apparatuses in the system ofthe change by including the change notice in a paging channel (PCH)(step S201).

When the change notice of the system information is included in thepaging channel (PCH), the mobile station apparatus 200 verifies a valuetag (Value Tag) that is broadcast by each downlink component carrier oreach downlink component carrier group in the component carrier groupthat is accessed by the mobile station (steps S202 and S203). The “valuetag (Value Tag)” represents a value that is incremented every time thesystem information is updated, is the broadcast information to be usedto check whether the system information is updated, and is transmittedusing the broadcast control channel (BCCH) (step S204). For a systemthat is configured by a plurality of component carriers, the value tag(Value Tag) indicates whether the system information has been updatedfor a component carrier on which the value tag (Value Tag) is disposed.

The mobile station apparatus 200 re-reads the system information(broadcast control channel (BCCH)) of the downlink component carrierwhose Value Tag indicates a value that is different from that of theValue Tag retained by the mobile station apparatus 200, and updates thesystem information. The mobile station apparatus 200 re-reads andupdates only the system information of the component carrier that isupdated (step S205).

In this case, the mobile station apparatus 200 that communicates usingthe plurality of component carriers monitors the paging channel (PCH) ofeach of the component carriers.

A second method of the procedure for handling a change notice of thesystem information will be described with reference to FIG. 9. Thechange of the system information is reported using the paging channel(PCH). When CCDIE and/or CCCIE is(are) changed, the base stationapparatus 100 notifies the mobile station apparatuses in the system ofthe change by including the change notice in a paging channel (PCH)(step S301).

When CCCIE is changed, the base station apparatus 100 disposes anordinary change notice on the paging channel (PCH) and notifies themobile station apparatus 200 that the system information is changed.When CCDIE is changed, an ordinary change notice of the systeminformation is transmitted on the paging channel (PCH) of the componentcarrier that has actually been changed. When CCDIE is changed, a specialchange notice of the system information (change notice indicating thatthe system information is changed for a component carrier other thanthis component carrier) is transmitted on the paging channel (PCH) ofthe component carrier other than the component carrier that has actuallybeen changed.

In this case, a mobile station apparatus that communicates using onecomponent carrier does not read any special change of the systeminformation. The special change of the system information is coded to beunreadable for a mobile station apparatus whose release version is oldand that can communicate using only one component carrier. The mobilestation apparatus whose release version is old and that can communicateusing only one component carrier does not notice the special changenotice of the system information. As to this, for example, only mobilestation apparatuses that communicate using a plurality of componentcarriers are enabled to receive the special change notice of the systeminformation by coding the special change notice of the systeminformation as option information in the paging channel (PCH), or bytransmitting special information attached on the physical downlinkcontrol channel (PDCCH) that is used when scheduling is executed for thepaging channel (PCH).

For example, a method that the mobile station apparatus 200 determinesthe kind of paging channel (PCH) from the value of the flag, that issimply disposed to indicate a special change notice of the systeminformation or a method that the mobile station apparatus 200 determinesthe kind of paging channel (PCH) from a value of MAC ID by setting thevalue of MAC ID disposed on the physical downlink by control channel(PDCCH) to SPI-RNTI that is different from PI-RNTI that is used in anordinary paging channel (PCH) and that is different for each componentcarrier that corresponds to the system information that needs to beupdated is used as a method of attaching the special information to thephysical downlink control channel (PDCCH) that is used when schedulingis executed for the paging channel (PCH).

When the ordinary change notice of the system information is included inthe paging channel (PCH), the mobile station apparatus 200 verifies avalue tag (Value Tag) that is broadcast by the component carrier onwhich the paging channel (PCH) is placed (steps S302 and S303). When thevalue of Value Tag is different from that of Value Tag retained by themobile station apparatus 200, the mobile station apparatus 200 re-readsthe system information and updates the system information (steps S304and S305).

When the special change notice of the system information is included inthe paging channel (PCH), the mobile station apparatus 200 verifies thevalue tag (Value Tag) that is broadcast by each of the downlinkcomponent carrier or the downlink component carrier group in thecomponent carrier group that is accessed by the mobile station (stepsS302 and S303). The mobile station apparatus 200 re-reads the systeminformation of the downlink component carrier whose Value Tag indicatesa value that is different from that of Value Tag retained by the mobilestation apparatus 200 and, thereby, updates the system information(steps S304 and S305). When the special change notice of the systeminformation is included in the paging channel (PCH), the mobile stationapparatus 200 may exclude the component carrier having disposed on thepaging channel (PCH) that includes the special change notice of thesystem information from the component carriers of Value Tag to beverified.

The mobile station apparatus 200 re-reads and updates only the systeminformation of the updated component carrier.

In this case, the mobile station apparatus 200 that communicates using aplurality of component carriers only needs to receive one paging channel(PCH) in the plurality of component carriers.

A third method of the procedure for handling a change notice of thesystem information will be described with reference to FIG. 10. Thechange of the system information is reported using the paging channel(PCH). When CCDIE and/or CCCIE is(are) changed, the base stationapparatus 100 notifies the mobile station apparatuses in the system ofthe change by including the change notice in a paging channel (PCH)(step S401).

When CCCIE is changed, the base station apparatus 100 disposes anordinary change notice on the paging channel (PCH) and notifies themobile station apparatus 200 that the system information is changed.When CCDIE is changed, an ordinary change notice of the systeminformation is transmitted on the paging channel (PCH) of the componentcarrier that has actually been changed. When CCDIE is changed, a specialchange notice of the system information (change notice indicating thatthe system information is changed for a component carrier other thanthis component carrier) is transmitted on the paging channel (PCH) ofthe component carrier other than the component carrier that has actuallybeen changed.

In this case, a mobile station apparatus that communicates using onecomponent carrier does not read any special change of the systeminformation. The special change of the system information is coded to beunreadable for a mobile station apparatus whose release version is oldand that can communicate using only one component carrier. The mobilestation apparatus whose release version is old and that can communicateusing only one component carrier does not notice the special changenotice of the system information. The method for giving the specialchange notice of the system information is the same as the above secondmethod.

In the third method, however, the special change notice of the systeminformation includes information that indicates the component carrierhaving the changed system information. Based on the information thatindicates the component carrier having the changed system information,the mobile station apparatus 200 can specify the component carrier thatcorresponds to the system information that needs to be updated. Onlymobile station apparatuses that communicate using a plurality ofcomponent carriers are enabled to receive the special change notice ofthe system information by coding the special change notice of the systeminformation and information to identify the component carrier thatcorresponds to the system information that needs to be updated as optioninformation in the paging channel (PCH), or by transmitting the specialinformation attached on the physical downlink control channel (PDCCH)that is used when scheduling is executed for the paging channel (PCH).

For example, a method of disposing a flag simply indicating that thenotification is a special notification of the change to the systeminformation and information to identify the component carriercorresponding to the system information that needs to be updated anddetermining by the mobile station apparatus 200 the component carriercorresponding to the system information that needs to be updated usingthe value of the flag, and a method of setting the value of MAC IDdisposed on the physical downlink control channel (PDCCH) to be SPI-RNTIthat is different from PI-RNTI that is used in an ordinary pagingchannel (PCH) and that is different for each component carrier thatcorresponds to the system information that needs to be updated anddetermining by the mobile station apparatus 200 the component carrierthat corresponds to the system information that needs to be updatedusing the value of MAC ID, are used as a method of supplying specialinformation to the physical downlink control channel (PDCCH) that isused when scheduling is executed for the paging channel (PCH).

When the ordinary change notice of the system information is included inthe paging channel (PCH), the mobile station apparatus 200 verifies thevalue tag (Value Tag) that is broadcast by the component carrier onwhich the paging channel (PCH) is placed (steps S402 and S403). When thevalue of Value Tag is different from that of Value Tag retained by themobile station apparatus 200, the mobile station apparatus 200 re-readsthe system information and updates the system information (steps S404and S405).

When the special change notice of the system information is included inthe paging channel (PCH), the mobile station apparatus 200 verifies thevalue tag (Value Tag) that is broadcast by each downlink componentcarrier that corresponds to information indicating the component carrierhaving the changed system information in the component carrier groupthat the mobile station accesses based on the information indicating thecomponent carrier that has the changed system information (steps S402and S403). When the mobile station apparatus 200 detects the value ofValue Tag that is different from that of Value Tag retained by themobile station apparatus 200, the mobile station apparatus 200 re-readsthe system information of the downlink component carrier and updates thesystem information (steps S404 and S405).

The mobile station apparatus 200 re-reads and updates only the systeminformation of the updated component carrier.

In this case, the mobile station apparatus 200 that communicates using aplurality of component carriers only needs to receive one paging channel(PCH) in the plurality of component carriers.

A fourth method of the procedure for handling a change notice of thesystem information will be described with reference to FIG. 11. Thechange of the system information is reported using the paging channel(PCH). When CCDIE and/or CCCIE is(are) changed, the base stationapparatus 100 notifies the mobile station apparatuses in the system ofthe change by including the change notice in a paging channel (PCH)(step S501).

When CCCIE is changed, the base station apparatus 100 disposes thechange notice of the system information on the paging channel (PCH) andnotifies the mobile station apparatus 200 that the system informationhas been changed. When CCDIE is changed, the change notice of the systeminformation is transmitted on the paging channel (PCH) of the componentcarrier that has actually been changed.

The mobile station apparatus 200 monitors the paging channel (PCH) ofthe component carrier that is set in the master. When the change noticeof the system information is included in the paging channel (PCH), themobile station apparatus 200 verifies the value tag (Value Tag) that isbroadcast by the component carrier on which the paging channel (PCH) isplaced (steps S502 and S503). When the value of Value Tag is differentfrom that of Value Tag retained by the mobile station apparatus 200, themobile station apparatus 200 re-reads the system information and updatesthe system information (step S504 and S505).

In the case where the mobile station apparatus 200 communicates using aplurality of component carriers, when the system information has beenupdated on a component carrier that is not in the master region for themobile station apparatus 200, the base station apparatus 100 notifiesthe mobile station apparatus 200 of CCDIE using the RRC signaling thatis transmitted on the common control channel (CCCH) or the dedicatedcontrol channel (DCCH) (step S506). When the mobile station apparatus200 acquires CCDIE that is given using the RRC signaling from the basestation apparatus 100, the mobile station apparatus 200 manages thisCCDIE for each component carrier (step S507).

Thereby, the mobile station apparatus 200 only needs to monitor thepaging channel (PCH) only in the master region. The base stationapparatus 100 only needs to transmit the paging channel (PCH) using onlythe component carrier that has been changed.

Though the above embodiments have been described assuming that theplurality of component carriers configure one system, it can also beinterpreted that a plurality of systems are aggregated to configure onesystem. It can also be interpreted that the component carrier representsa region for the system to operate therein by setting the carrierfrequency to be equal to the center of each component carrier by aspecific receiving-side apparatus or a specific transmitting-sideapparatus.

For the convenience of description, each of the embodiments has beendescribed taking the example of the case where the base stationapparatus and the mobile station apparatus are in a one-to-one relation.However, a plurality of base station apparatuses and a plurality ofmobile station apparatuses may be employed. The mobile station apparatusis not limited to a terminal that moves around and may be realized byimplementing the functions of the mobile station apparatus on the basestation apparatus or a fixed terminal.

In each of the above embodiments, the base station apparatus and themobile station apparatus may be controlled by recording a program torealize the functions of the base station apparatus and the functions ofthe mobile station apparatus on a computer-readable recording medium,and causing a computer system to read and execute the program recordedon the recording medium. The “computer system” used herein includes anOS and hardware such as peripherals.

The “computer-readable recording medium” refers to a portable mediumsuch as a flexible disc, a magneto-optical disc, a ROM, or a CD-ROM; ora recording apparatus such as a hard disc incorporated in a computersystem. The “computer-readable recording medium” includes a medium thatdynamically retains a program for a short time such as a communicationcable used when a program is transmitted through a network such as theInternet or a communication line such as a telephone line and a mediumthat retains a program for a specific length of time such as a volatilememory in a computer system that acts as a server or a client in theabove case. The program may be a program to realize some of the abovefunctions or may also be a program that can realize the above functionsby being combined with programs that are already recorded on thecomputer system.

The embodiments of the present invention have been described withreference to the accompanying drawings. However, the specificconfigurations are not limited to those in the embodiments and designs,etc., within the scope not departing from the purview of the presentinvention are included in the claims.

EXPLANATIONS OF REFERENCE NUMERALS

100 . . . base station apparatus, 101 . . . data control section, 102 .. . OFDM modulating section, 103 . . . wireless section, 104 . . .scheduling section, 105 . . . channel estimating section, 106 . . .DFT-S-OFDM demodulating section, 107 . . . data extracting section, 108. . . upper layer, 200 . . . mobile station apparatus, 201 . . . datacontrol section, 202 . . . DFT-S-OFDM modulating section, 203 . . .wireless section, 204 . . . scheduling section, 205 . . . channelestimating section, 206 . . . OFDM demodulating section, 207 . . . dataextracting section, 208 . . . upper layer, A1, A2 . . . antenna section

1-15. (canceled)
 16. A mobile communication system including a basestation apparatus and a mobile station apparatus, wherein systeminformation elements concerning a plurality of component carriers aremanaged being classified into information specific to each of thecomponent carriers and information common to a plurality of componentcarriers.
 17. The mobile communication system as defined in claim 16,comprising radio resource control signaling to notify of systeminformation elements that are specific to each of the componentcarriers.
 18. A mobile communication system including a base stationapparatus and a mobile station apparatus, comprising: a first componentcarrier that receives paging; and a second component carrier that doesnot receive the paging, wherein system information elements concerningthe first and the second component carriers are managed being classifiedinto information specific to each of the component carriers andinformation common to a plurality of component carriers.
 19. The mobilecommunication system as defined in claim 18, comprising radio resourcecontrol signaling to notify of system information elements that arespecific to the component carrier.
 20. A mobile communication systemthat uses paging to notify of updating of system information elements ofa first component carrier, wherein updating of system informationelements of a second component carrier is notified by using radioresource control signaling.
 21. A mobile station apparatus in a mobilecommunication system including a base station apparatus and the mobilestation apparatus, wherein system information elements concerning aplurality of component carriers are managed being classified intoinformation specific to each of the component carriers and informationcommon to a plurality of component carriers.
 22. The mobile stationapparatus as defined in claim 21, wherein the mobile station apparatusacquires the system information elements that are specific to thecomponent carrier from radio resource signaling.
 23. A mobile stationapparatus in a mobile communication system including a base stationapparatus and the mobile station apparatus, comprising: a firstcomponent carrier that receives paging; and a second component carrierthat does not receive the paging, wherein system information elementsconcerning the first and the second component carriers are managed beingclassified into information specific to each of the component carriersand information common to a plurality of component carriers.
 24. Themobile station apparatus as defined in claim 23, wherein the mobilestation apparatus acquires the system information elements that arespecific to the component carrier from radio resource signaling.
 25. Amobile station apparatus in a mobile communication system that usespaging to notify of updating of system information elements of a firstcomponent carrier, wherein the mobile station apparatus detects updatingof system information elements that are specific to a second componentcarrier from radio control signaling.
 26. A base station apparatus in amobile communication system including the base station apparatus and amobile station apparatus, wherein system information elements concerninga plurality of component carriers are managed being classified intoinformation specific to each of the component carriers and informationcommon to a plurality of component carriers.
 27. The base stationapparatus as defined in claim 26, wherein the base station apparatusnotifies of the system information elements that are specific to thecomponent carrier using wireless control signaling.
 28. A base stationapparatus in a mobile communication system including the base stationapparatus and a mobile station apparatus, comprising: a first componentcarrier that receives paging; and a second component carrier that doesnot receive the paging, wherein system information elements concerningthe first and the second component carriers are managed being classifiedinto information that is specific to each of the component carriers andinformation that is common to a plurality of component carriers.
 29. Thebase station apparatus as defined in claim 28, wherein the base stationapparatus notifies of the system information elements that are specificto each of the component carriers using radio control signaling.
 30. Abase station apparatus in a mobile communication system that uses pagingto notify of updating of system information elements of a firstcomponent carrier, wherein the base station apparatus notifies of theupdating of the system information elements of a second componentcarrier using radio resource signaling.